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94f2bc0740
charge_manager may request a charge current limit less than the capability of the supply in certain cases (eg. during PD voltage transition, to make an effort to comply with reduced load spec). Depending on the battery / system state, setting a reduced charge current limit may result in brownout. Pass the uncapped / max negotiated current to board_set_charge_limit() so that boards may use it instead of the requested limit in such circumstances. BUG=chrome-os-partner:56139 BRANCH=gru TEST=Manual on kevin with subsequent commit, boot system with zinger + low-charge battery, verify devices powers up to OS without brownout. Change-Id: I2b8e0d44edcf57ffe4ee0fdec1a1ed35c6becbbd Signed-off-by: Shawn Nematbakhsh <shawnn@chromium.org> Reviewed-on: https://chromium-review.googlesource.com/383732 Commit-Ready: Shawn N <shawnn@chromium.org> Tested-by: Shawn N <shawnn@chromium.org> Reviewed-by: Vincent Palatin <vpalatin@chromium.org>
95 lines
2.2 KiB
C
95 lines
2.2 KiB
C
/* Copyright 2015 The Chromium OS Authors. All rights reserved.
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* Use of this source code is governed by a BSD-style license that can be
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* found in the LICENSE file.
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*/
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/* Charge input current limit ramp header for Chrome EC */
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#ifndef __CROS_EC_CHARGE_RAMP_H
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#define __CROS_EC_CHARGE_RAMP_H
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#include "timer.h"
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/* Charge ramp state used for checking VBUS */
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enum chg_ramp_vbus_state {
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CHG_RAMP_VBUS_RAMPING,
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CHG_RAMP_VBUS_STABLE
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};
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/**
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* Check if ramping is allowed for given supplier
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*
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* @supplier Supplier to check
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*
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* @return Ramping is allowed for given supplier
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*/
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int board_is_ramp_allowed(int supplier);
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/**
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* Get the maximum current limit that we are allowed to ramp to
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*
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* @supplier Active supplier type
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* @sup_curr Input current limit based on supplier
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*
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* @return Maximum current in mA
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*/
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int board_get_ramp_current_limit(int supplier, int sup_curr);
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/**
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* Check if board is consuming full input current
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*
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* @return Board is consuming full input current
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*/
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int board_is_consuming_full_charge(void);
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/**
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* Check if VBUS is too low
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*
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* @param ramp_state Current ramp state
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*
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* @return VBUS is sagging low
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*/
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int board_is_vbus_too_low(enum chg_ramp_vbus_state ramp_state);
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/**
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* Get the input current limit set by ramp module
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*
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* Active input current limit (mA)
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*/
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int chg_ramp_get_current_limit(void);
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/**
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* Return if charge ramping has reached stable state
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*
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* @return 1 if stable, 0 otherwise
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*/
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int chg_ramp_is_stable(void);
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/**
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* Return if charge ramping has reached detected state
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*
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* @return 1 if detected, 0 otherwise
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*/
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int chg_ramp_is_detected(void);
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#ifdef HAS_TASK_CHG_RAMP
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/**
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* Notify charge ramp module of supplier type change on a port. If port
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* is CHARGE_PORT_NONE, the call indicates the last charge supplier went
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* away.
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*
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* @port Active charging port
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* @supplier Active charging supplier
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* @current Minimum input current limit
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* @registration_time Timestamp of when the supplier is registered
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*/
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void chg_ramp_charge_supplier_change(int port, int supplier, int current,
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timestamp_t registration_time);
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#else
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static inline void chg_ramp_charge_supplier_change(
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int port, int supplier, timestamp_t registration_time) { }
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#endif
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#endif /* __CROS_EC_CHARGE_RAMP_H */
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